Senior Kadima ministers told Ynet over the last couple of weeks that a unilateral realignment plan is impossible.
The remarks were made by some of the most senior government ministers, who were politically affiliated with right-wing parties before Kadima's establishment.
One minister said: "If you think it is possible to implement a unilateral realignment plan, and realign along the three large settlement blocks - forget it. It is impossible. There is no support for this in the world. I am not sure the plan will gain majority support within Kadima."
"Withdrawing unilaterally and failing to gain approval for the final border, undermines the entire process. What do we gain from withdrawing from the territories, if we fail to establish a permanent border?" the minister asked.
The minister said he fears that the Kadima-Labor coalition will collapse over disagreements on the plan.
The ministers also criticized Olmert's unwillingness to launch peace talks with Palestinian President Mahmoud Abbas. One minister said: "We need to talk with Abu Mazen as soon as possible. It is not right to create a situation where there is no one to talk to."